Digital Pressure Switch; Description; Technical Data - Viking ESFR Technical Data Manual

March 7, 2008
The Viking Corporation, 210 N Industrial Park Road, Hastings MI 49058
Telephone: 269-945-9501 Technical Services 877-384-5464 Fax: 269-945-4495 Email: techsvcs@vikingcorp.com

6. Digital Pressure Switch

A. Description
Viking Supervisory Pressure Switches (#4, 5, & 6) are factory programmed
electronic digital pressure switches installed in three locations of the ESFR Cold
Storage System. The pressure switches are designed to initiate an electric signal
at a predetermined low pressure setting or a predetermined high pressure setting
to maintain system antifreeze solution pressure, relieve high pressure or start the
CS-1 Pump. Viking Supervisory Pressure Switches are SPDT pressure trans-
ducer switches. The Switches show the current pressure on the LED display
The pressure switches are used in each of the following locations (refer to Figure
25):
• On the Automatic Pressure Control System (Switch #4) (Included with Cold Storage Trim)
• On the system riser to control the solenoid valve (Switch #5) (Must be ordered separately)
• On the CS-1 pump unit to control the pump (Switch #6) (Included with CS-1 Tank and
Pump)
B. Technical Data
Factory Settings: Switch # 4 (N/O)
Cut-Out:
Cut-In:
Specifications:
Dimensions: 1-7/8" (48 mm) W x 4-3/4" (120 mm) H (See Figure 25)
Pressure Connection: ¼" female NPT
Electrical Connection: ½" UNF-Connector, angled design
Maximum System Pressure: 175 PSI (12 Bar)
Voltage: 85-265 AC (45-65 HZ)
Current Rating [mA]:
2.5A @ 68 °F (20 °C)
1.5A @ 113 °F (45 °C)
1A @ 140 °F (60 °C)
0.25A @ 158 °F (70 °C)
Current Consumption: < 10 mA
Protection: IP65, Protection Class: II
Operating Temperature: -13 °F (-25 °C) to 176 °F (80 °C)
Not for use in hazardous locations
Cable Part Number 13231 is 13 ft (4 m) long
Material Standards:
Stainless Steel (303S22), ceramics; FPM (Viton)
Housing: EPDM/X (Santoprene), FPM (Viton), PA, Pocan, PC (Macrolon), Stainless Steel
(304S15)
Body: TPU (urethane)

TECHNICAL DATA

Switch # 5 (N/C)
75 PSI (5.17 Bar) 50 PSI (3.45 Bar)
85 PSI (5.86 Bar) 40 PSI (2.76 Bar)
ESFR PRE-PRIMED SINGLE
INTERLOCK PREACTION
COLD STORAGE SYSTEM
Switch # 6 (N/C)
75 PSI (5.17 Bar)
45 PSI (3.1 Bar)
Figure 25 - Switch
Dimensions
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